djvu | ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303

General

Target

ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe
Size

806KB
MD5

dd8310469ceafb12c085f3627f22d56a
SHA1

f0c74f58a78fd721467cd1abc0b1e716e91c836e
SHA256

ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303
SHA512

289e9b37efde6bb332c752bb3a34b1075c2cd792aacf91ca2024111111b55e35c6493ad77364fdea0809c211bd4400cb61621e03e8aa988f2da802ff20396cae
SSDEEP

12288:uUlpMroe4ioF6SVwxlRqeImN/3oRgjdVjr8dKEIitmZZLt1:uUUL9+JVPel/3oq3jwmi6R1

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://zexeq.com/test1/get.php

Attributes

extension
.oopl
offline_id
dhL6XvokZotUzL67Na5WfNIBufODsob7eYc3mzt1
payload_url
http://colisumy.com/dl/build2.exe

http://zexeq.com/files/1/build3.exe
ransomnote
ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-XA1LckrLRP Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0782Okhu

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral2/memory/3676-2-0x0000000004210000-0x000000000432B000-memory.dmp	family_djvu
behavioral2/memory/4216-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4216-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4216-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4216-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4216-16-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4980-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4980-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4980-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\Control Panel\International\Geo\Nation	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3712	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f25f16d1-d458-4b5b-b67d-aa0abd7264c6\\ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe\" --AutoStart"	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
8	api.2ip.ua
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3676 set thread context of 4216	3676	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	84
PID 3828 set thread context of 4980	3828	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	94

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4252	4980	WerFault.exe	94

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4216	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe
4216	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3676 wrote to memory of 4216	3676	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	84
PID 3676 wrote to memory of 4216	3676	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	84
PID 3676 wrote to memory of 4216	3676	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	84
PID 3676 wrote to memory of 4216	3676	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	84
PID 3676 wrote to memory of 4216	3676	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	84
PID 3676 wrote to memory of 4216	3676	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	84
PID 3676 wrote to memory of 4216	3676	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	84
PID 3676 wrote to memory of 4216	3676	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	84
PID 3676 wrote to memory of 4216	3676	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	84
PID 3676 wrote to memory of 4216	3676	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	84
PID 4216 wrote to memory of 3712	4216	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	89
PID 4216 wrote to memory of 3712	4216	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	89
PID 4216 wrote to memory of 3712	4216	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	89
PID 4216 wrote to memory of 3828	4216	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	92
PID 4216 wrote to memory of 3828	4216	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	92
PID 4216 wrote to memory of 3828	4216	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	92
PID 3828 wrote to memory of 4980	3828	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	94
PID 3828 wrote to memory of 4980	3828	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	94
PID 3828 wrote to memory of 4980	3828	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	94
PID 3828 wrote to memory of 4980	3828	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	94
PID 3828 wrote to memory of 4980	3828	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	94
PID 3828 wrote to memory of 4980	3828	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	94
PID 3828 wrote to memory of 4980	3828	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	94
PID 3828 wrote to memory of 4980	3828	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	94
PID 3828 wrote to memory of 4980	3828	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	94
PID 3828 wrote to memory of 4980	3828	ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe	94

C:\Users\Admin\AppData\Local\Temp\ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe
"C:\Users\Admin\AppData\Local\Temp\ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3676
- C:\Users\Admin\AppData\Local\Temp\ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe
  "C:\Users\Admin\AppData\Local\Temp\ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4216
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\f25f16d1-d458-4b5b-b67d-aa0abd7264c6" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3712
- - C:\Users\Admin\AppData\Local\Temp\ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe
    "C:\Users\Admin\AppData\Local\Temp\ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3828
  - - C:\Users\Admin\AppData\Local\Temp\ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe
      "C:\Users\Admin\AppData\Local\Temp\ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:4980
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 4980 -s 568
        5⤵
        Program crash
        
        PID:4252

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 4980 -ip 4980
1⤵
PID:4544

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

File and Directory Permissions Modification

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\f25f16d1-d458-4b5b-b67d-aa0abd7264c6\ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303.exe

Filesize
806KB

MD5
dd8310469ceafb12c085f3627f22d56a

SHA1
f0c74f58a78fd721467cd1abc0b1e716e91c836e

SHA256
ef896c2e6c8e532284e1e19decbca258570e72a08a31f407df99cf228a343303

SHA512
289e9b37efde6bb332c752bb3a34b1075c2cd792aacf91ca2024111111b55e35c6493ad77364fdea0809c211bd4400cb61621e03e8aa988f2da802ff20396cae

Download Submit
memory/3676-1-0x00000000040F0000-0x0000000004188000-memory.dmp

Filesize
608KB

Download
memory/3676-2-0x0000000004210000-0x000000000432B000-memory.dmp

Filesize
1.1MB

Download
memory/3828-19-0x0000000003F80000-0x0000000004019000-memory.dmp

Filesize
612KB

Download
memory/4216-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4216-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4216-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4216-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4216-16-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4980-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4980-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4980-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads